Elena Long Joint Hall AC Collaboration Meeting Jefferson
Elena Long Joint Hall A/C Collaboration Meeting Jefferson Lab June 6 t h , 2014 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 1
Today’s Discussion ◦ Overview of Physics Motivation ◦ Letter of Intent Measurement ◦ Challenges ◦ Opportunities ◦ Summary 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 2
Physics Overview 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 3
Tensor Polarization For tensor polarization, need spin-1 particles Spin-1 System Spin-½ System m = +1 m = +½ m = 0 m = -½ Tensor polarization fills the m = 0 state m = -1 Animations by S. C. Pieper, et al, http: //www. phy. anl. gov/theory/movie-run. html 06/06/2014 J. Forest, et al, Phys. Rev. C 54, 646 (1996) Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 4
0 for unpolarized beam 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 5
Deuteron Wave Function 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 6
Connection to Short Range Correlations N. Fomin et al. , Phys. Rev. Lett. 108 (2012) 092505 06/06/2014 Short range correlations caused by tensor force – why not probe it through tensor polarization? L. L. Frankfurt et al. , Int. J. Mod. Phys. A 23 (2008) 2991 -3055 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 7
Frankfurt and Strikman Light Cone Calculations L. L. Frankfurt, M. I. Strikman, Phys. Rept. 76 (1981) 215 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 8
Sargsian Light Cone and Virtual Nucleon Calculations M. Sargsian, Private Communication 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 9
Interest from Theorists 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 10
Spokespeople: E. Long, K. Slifer, P. Solvignon University of New Hampshire 06/06/2014 D. Day, D. Keller University of Virginia D. Higinbotham Jefferson Lab Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 11
Rates for D(e, e’)X P. E. Bosted, V. Mamyan, ar. Xiv: 1203. 2262 M. Sargsian, Private Communication N. Fomin, et al. , Phys. Rev. Lett. 108 (2012) 092502 N. Fomin, et al. , Phys. Rev. Lett. 105 (2010) 212502 E. Long, Technical Note, JLAB-TN-13 -029 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 12
Dilution Factor 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 13
Experimental Set-Up S MS M H SSH Slow Raster Lumi Unpolarized Beam Fast Raster Faraday Cup Polarized Target HM S 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 14
DNP Target Figure courtesy of C. Keith 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 15
Target Development in Progress ◦ UVa Target Lab has successfully polarized deuterated butanol in April ◦ UNH Target Lab is ramping up, first cool-down in January, successfully reached 7 T Courtesy of D. Keller 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 16
Experimental Details 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 17
Kinematics 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 18
Systematics Estimate 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 19
06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 20
Challenges 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 21
Opportunities 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 22
06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 23
Thank you 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 24
06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 25
Backup Slides 06/06/2014 Joint Hall A/C Collaboration Meeting Elena Long <ellie@jlab. org> 26
Light Cone Kinematics 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 27
Lower Tensor Polarization Pzz = 30% 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 28
Lower Tensor Polarization Pzz = 25% 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 29
Lower Tensor Polarization Pzz = 20% 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 30
UNH Magnetic Field Map 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 31
UNH Magnetic Field Map 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 32
UNH Magnetic Field Map 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 33
Tensor Polarization Optimization UVA: 30% at 5. 0 T Born: 20% at 2. 5 T 34
Tensor Polarization Measurement Vector optimize with microwaves Fit peaks with convolution Tensor optimize with RF Measure change in peaks using Riemann Sum segments Ratio of instantaneous to initial NMR signal area Percentage of initial peak shifted any time (from reduced side) Available tensor enhancement 35
Brute Force Tensor Polarization When vector polarizing deuterium, some amount of tensor polarization occurs Higher vector polarization Higher tensor polarization
Cross Section Calculations - Deuterium N. Fomin, et al. , Phys. Rev. Lett. 108 (2012) 092502 N. Fomin, et al. , Phys. Rev. Lett. 105 (2010) 212502 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 37
Cross Section Calculations - Carbon N. Fomin, et al. , Phys. Rev. Lett. 108 (2012) 092502 N. Fomin, et al. , Phys. Rev. Lett. 105 (2010) 212502
Cross Section Calculations - Deuterium W. P. Shutz, et al. , Phys. Rev. Lett. 38, 259 (1977) 03/11/2014 Tensor Spin Observables Workshop Elena Long <ellie@jlab. org> 39
- Slides: 39